Four of Chester's orangutans go missing. The dominant female meerkat faces a power struggle with her own daughter. Can bull elephant Aung Bo help provide a baby to keep lone youngster Nandita company?

The keepers are busy making gifts for the animals but there's chaos when the chimps seek out their parcels. Will dwarf mongooses Cooper and Mini have new babies before Christmas? Plus rhinos and ants.

Sun bears Toni and Millie have relationship problems. Critically endangered eastern black rhino Zuri gives birth to baby Ike. Otter Annie has three new pups. And camel Shan-shan is unwell.

When dik dik Kahri becomes a dad, his fight or flight instinct goes into overdrive. Meanwhile, the keepers face the dangerous task of replacing a broken window in the reticulated python habitat.

Tapir Jenny, who has two young offspring, falls ill. Can rhino Kifaru, who has arthritic knees, mate with younger, taller and heavier female rhino Malindi? Widowed porcupine Roxy meets a new mate.

Grumpy elephant Thi is expecting a baby. The chimps battle for dominance. Red panda Nima gives her partner Jung the cold shoulder. And the meerkats prove they're not as loveable as they first seem.

Female rhino Kitani is introduced to her new mate, Magadi. But rhino mating is a risky business. There's a surprise birth in the orangutan house. Plus: fruit bats, macaques and young jaguars.

As the festive season approaches at Chester, the zoo's youngsters - from giraffes to monkeys - are about to have their first Christmas, and there are other newbies, too.

It is time for mouse deer Una to leave her parents and meet a mate of her own, but she is being shy around her future partner, Biani. Aardvark Koos gets romantic with his sister in this night-time special. Can underdog seahorse Seabiscuit grow the vital appendage he needs to attract a mate?

Young elephant Nandita isn't happy when her half-sister is born. Bush dog Franco has got his sister-in-law pregnant. Rhino beetle Sheldon has a damaged wing case; can he impress female beetle Alice?

Oana the anoa and capybara Lochley both give birth. Tiger mum Kirana's sons are being moved to other zoos to start their own families. Young monkey Rocky won't pay attention to his mum's life lessons.

Mr Parsons the chameleon meets a new mate, Daphne from Paris. Young giraffe Murchison faces the great outdoors for the first time. And another baby elephant is born.

Sloth Tina has been giving her partner Rico a hard time, but the keepers have a plan to bring them closer together. And three-legged chameleon Tripod goes speed-dating.

Spotty chocolate poison dart frog Roy faces competition from hunky newcomer Hunter. And keepers hope there may be a first joey on the way for dusky padamelon Styx.

Four rare and mysterious tenrecs arrive at the zoo. Endangered eastern black rhino Kitani is due to give birth. And jewel wasp Ripley searches for a cockroach to turn into a zombie egg incubator.

Inseparable penguins Rud and Spike have been a couple for 15 years. But Rud's arthritic hip could be affecting his quality of life. The tigers move house, and a tarantula risks his life to reproduce.

Keepers are keen to breed some baby eastern bongos, a critically-endangered species of antelope. Pinstripe damba fish George needs an immediate operation to prevent suffocation.

Young giraffe mum Tula gives birth, while this year's brood of penguin chicks face the ordeal of joining the main pool, where they must compete for fish with the adult penguins

Jaguars Napo and Goshi haven't been breeding. Will training Napo to be more assertive change that? Young elephants Aayu and Nandita are seriously ill. Plus: silvery gibbons and dragon-headed katydids.

Vila the chimp makes a bid for the job of top female only to get hurt in a fight with rival Alice. And Chester Zoo's super-rare pink pigeons need to stop arguing and start mating.

Young rat snake Sen meets male Jakob, but will they mate or will Jakob eat Sen for dinner?. When Bornean Orangutan Sarkiei becomes sickly, keepers must separate her from prized son Tombol and Rothschild's giraffe Dagmar becomes dangerously thin, keepers must determine whether or not to part her from calf Mburo. The male giant otter pup is struggling to eat and walk.

Keepers are curious when Margery the Malayan tapir is suddenly eating for two; a deadly virus is suspected of being the cause behind a female hyacinth macaw's untimely death, her partner James Bond must undergo total isolation.

Tortoises Burt and Terrance, who've been best mates for 70 years, compete for the affections of breeding female Smooth Sides. Pregnant okapi K'Tusha is due to give birth. Plus: vultures and elephants.

Newcomer Safi, a rare bongo antelope from the mountains of Kenya, is giving enthusiastic breeding partner Moti the runaround. Very soon the keepers realise why - it seems she may be about to give birth earlier than expected. Sunda gharial crocodiles Frank and Frankie need to have their blood tested - but taking a sample from one of the world's largest and most dangerous reptiles is easier said than done - and George the giant rat needs to have surgery after an X-ray pinpoints a huge lump of hard faeces in his stomach.

Adolescent babirusa Tolo has a hoof problem. Rock hyraxes Daissie and her partner Nungu are expecting their eighth litter. At the reptile house, the Bermuda skinks have a ferocious approach to mating as Poptart meets Sharkface.

Chester Zoo's alpha male lion is having a crisis of confidence. There's been a bloodbath among the vampire crabs. And affable Andean bear Bernie has been kicked out of the family paddock.

A pig goes on the run. Giraffe Narus is being moved to another zoo, but getting him into a horsebox isn't easy. And can the keepers encourage mono-browed fish Noel Gallagher and Frida Kahlo to mate?

Hornbills survived a fire that swept through their home, but it may have derailed their plans for chicks. Meerkat matriarch Huskie seems to have lost her breeding instincts. Sun bear Milli has her paws full bringing up her daughter Kyra.

Two of Chester Zoo's zebras are about to give birth. Meanwhile, lioness Kumari seems to be losing interest in her partner, Iblis. And two of warthog Magnum's children are becoming hard to control.

It's Christmas at Chester Zoo. The UK's first ever surviving sun bear cub is born, and there's a yuletide ceasefire in the turf war between the otters and the babirusas.

The keepers think that pregnant elephant Thi is three months overdue. Rampant giraffe Meru relentlessly chases the females in his herd. Plus: anteaters and clownfish.

As the documentary series following life at Chester Zoo returns, on Chimpanzee Island the younger males test the pecking order. And there's a fish out of water at the aquarium. Deer couple Serena and Odin welcome their second doe.

Bush dog Mana is pregnant. There's a power struggle on chimp island. Otter Wallace is struck down by a mystery illness. And is romance in the air for wattled cranes Wilma and Ivan?

Can adolescent orangutan Tuti prove that she's responsible enough to hold baby Kesuma? Dangerous turtle Shrek gets a new mate. Tiny babirusa piglet Tomini is struggling to survive. Plus: cheetahs.

Keepers spot that Asian short-clawed otter pups are developing bald patches, threatening their waterproofing. Plus, Caribbean flamingos, Asian elephants and dik-dik antelopes.

Boris the chimp takes a moorhen chick hostage. French crocodile François turns his snout up at British food. The keepers try to spark romance between turtles Raja and Aris. Plus: young penguins.

Chameleons Charles and Eddie try to impress new arrival Ruby. Orangutan sisters Emma and Subis are expecting babies by male Puluh at the same time. The aardvarks are making the new meerkats anxious.

Kendari the babirusa is pregnant, but otters Wallace and Annie keep throwing stones at her house. Next door, orangutan Willie is struggling to impress females Sarikei and Leia.